Technical data

51
Does burner light?
Does yellow flame indicator ( ) flash?
Check/change NTC and connections
Does red lockout indicator ( ) glow after 2nd ignition attempt?
Check ignition system and gas section
Sheet G
Yes
Yes
No
Flame supervision device defective, replace electronic boards.
Check gas supply.
Reset lockout (turn central heating control to position ( ) and release). Does sparking commence at burner?
Go to sheet H.
No
Yes
No
Yes
Go to sheet H.
Check all electrodes and leads for damage and correct connection. Replace if necessary.
No
Does sparking commence at burner now?
Ignition transformer on electronic board defective, replace electronic boards.
No
Yes